重庆磨心坡矿区水文地质特征分析

Analysis on Hydrogeological Characteristics of Moxinpo Mining Area in Chongqing City

通过对磨心坡矿区水文地质特征的分析,认为矿区的主要含水层为碳酸盐岩裂隙含水岩组、碎屑岩裂隙含水岩组和松散层孔隙含水层组。矿井地下水全依赖降水补给,而矿井充水水源主要来自顶底板石灰岩裂隙及岩溶、采空区、地表水及塌陷洼地等,多以淋水、滴水或渗水的方式进入巷道、石门及采区。矿井涌水量主要受采煤面积和水位降深的影响,并随其增大而增加;此外,各水平涌水量还随掘采程度变化而变化,当下部水平掘采工程逐渐加剧时,上部水平涌水量则逐渐减小,下部水平涌水量则逐渐增大。

Through hydrogeological characteristics analyses,considered that the main aquifers in the mining area have carbonate rock fractured aquifer group,clastic rock fractured aquifer group and loose bed porous aquifer group in Moxinpo mining area.Mine groundwater all depended on precipitation supply,but the mine source of water mainly adapted from the limestone fissures of coal-bed roof and floor,karst caves,gob area,surface water,and collapse depression;mostly drenched,instilled and infiltrated into the roadway,crosscut and mining area.Coalmine water inflow is mainly effected by the mining area and drawdown,increasing along with;moreover,each level water inflow follow the mining projects change,when the lower part level deepen gradually,the upper level water inflow decreased,and the lower level water inflow increased.